ClassID:

219601

H03F2200/324 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers An amplitude modulator or demodulator being used in the amplifier circuit

Recent Application in this class:
#1
20250330130
2025-10-23

Systems and Methods for Optimizing Amplifier Operations

#2
20240283410
2024-08-22

Systems and methods for optimizing amplifier operations

#3
20230075284
2023-03-09

Systems and methods for optimizing amplifier operations

#4
20210408983
2021-12-30

Digital power amplifier with RF sampling rate and wide tuning range

#5
20210359655
2021-11-18

Linear amplifier

#6
20210305950
2021-09-30

Power amplifier evaluation method and measurement system

#7
20210083635
2021-03-18

Supply modulating circuit including switching circuit and wireless communication device including the supply modulating circuit

#8
20210067107
2021-03-04

Digital power amplifier with RF sampling rate and wide tuning range

#9
20200228068
2020-07-16

Systems and methods for optimizing amplifier operations

#10
20200195213
2020-06-18

Power amplification module

#11
20190253023
2019-08-15

Dual-output and dual-mode supply modulator, two-stage power amplifier using the same, and supply modulation method therefor

#12
20190097588
2019-03-28

Systems and methods for optimizing amplifier operations

#13
20190089315
2019-03-21

Amplifier and a wireless signal receiver comprising said amplifier

#14
20180375485
2018-12-27

Power amplification module

#15
20180342986
2018-11-29

Clockless frequency detector

#16
20170338779
2017-11-23

Systems and methods for optimizing amplifier operations

#17
20170264246
2017-09-14

Envelope tracking power amplifying apparatus and method

#18
20170214375
2017-07-27

Power amplification module

#19
20170179911
2017-06-22

Power amplification module

#20
20170105059
2017-04-13

Low distortion single-to-differential wide-band variable gain amplifier for optical communications

#21
20170047895
2017-02-16

Systems and methods for dynamic range enhancement using an open-loop modulator in parallel with a closed-loop modulator

#22
20170005654
2017-01-05

Switching circuit

#23
20170005629
2017-01-05

Average power tracking mode power amplifier using dual bias voltage levels

#24
20160322947
2016-11-03

Power amplification module

#25
20160322941
2016-11-03

Systems and methods for providing modulation of switchmode RF power amplifiers

#26
20160315594
2016-10-27

Power amplification module

#27
20160190999
2016-06-30

Systems and methods for optimizing amplifier operations

#28
20160181991
2016-06-23

Amplification device and amplification method

#29
20160118948
2016-04-28

Systems and methods for dynamic range enhancement using an open-loop modulator in parallel with a closed-loop modulator

#30
20160065133
2016-03-03

Power-efficient chopper amplifier

#31
20150280649
2015-10-01

Systems and methods for providing modulation of switchmode RF power amplifiers

#32
20150171795
2015-06-18

Digital amplifier

#33
20150155843
2015-06-04

Amplifying system

#34
20150147986
2015-05-28

Power amplifier with self aligned peaking stage

#35
20150145604
2015-05-28

High efficiency radio frequency power amplifier circuitry with reduced distortion

#36
20150145594
2015-05-28

Overstress management for power amplifiers

#37
20150084691
2015-03-26

Switching amplifier and transmitter using same

#38
20150077187
2015-03-19

Dynamic error vector magnitude duty cycle correction

#39
20150035606
2015-02-05

Time and amplitude alignment in envelope tracking amplification stage

#40
20140306763
2014-10-16

Integrated circuit wireless communication unit and method for providing a power supply

#41
20140266433
2014-09-18

Systems and methods for optimizing amplifier operations

#42
20140248846
2014-09-04

Terrestrial broadcast wave reception-use antenna device and component of same

#43
20130285741
2013-10-31

Power amplifier with fast loadline modulation

#44
20130278340
2013-10-24

Power amplifiers with improved power control

#45
20130229229
2013-09-05

Device and method for increasing output efficiency of mobile communication terminal

#46
20130021096
2013-01-24

Digital amplifier

#47
20120293266
2012-11-22

Power amplifiers with improved efficiency over power control

#48
20120293264
2012-11-22

Power control for linear and class AB power amplifiers

#49
20120268129
2012-10-25

Transmitting device for driving a high-frequency antenna of a magnetic-resonance device

#50
20120201337
2012-08-09

AM-PM synchronization unit

#51
20120188024
2012-07-26

Power amplifier, wireless communication device, and power amplification method

#52
20120171971
2012-07-05

Low noise RF driver

#53
20120170681
2012-07-05

Negative amplitude polar transmitter

#54
20120139706
2012-06-07

Systems and methods for providing modulation of switchmode RF power amplifiers

#55
20120114075
2012-05-10

Transmission circuit

#56
20120105111
2012-05-03

Transmitter including polar modulation circuit

#57
20120001693
2012-01-05

Power amplifier amplitude modulator system and method

#58
20110163822
2011-07-07

Power amplifier

#59
20100330913
2010-12-30

Polar transmitter amplifier with variable output power

#60
20100311365
2010-12-09

Power amplifier controller with polar transmitter

#61
20100297965
2010-11-25

Amplitude modulation controller for polar transmitter

#62
20100264990
2010-10-21

Amplifying circuit, AC signal amplifying circuit and input bias adjusting method

#63
20100227577
2010-09-09

APPARATUS AND METHOD FOR IMPROVING LINEARITY OF TRANSMITTER

#64
20100201441
2010-08-12

Amplifying device

#65
20100156540
2010-06-24

Amplifier architecture for polar modulation

#66
20100066429
2010-03-18

Power supply voltage forming device and polar modulation transmission device

#67
20100052794
2010-03-04

Method and system for improving efficiency over power control for linear and class AB power amplifiers

#68
20090315620
2009-12-24

Power amplifier

#69
20090262863
2009-10-22

Amplitude control circuit, polar modulation transmission circuit and polar modulation method

#70
20090186592
2009-07-23

RADIO RECEIVER AND RECEIVING SEMICONDUCTOR INTEGRATED CIRCUIT

#71
20090174473
2009-07-09

Systems, methods, and apparatuses for linear envelope elimination and restoration transmitters

#72
20090163156
2009-06-25

DAC based switching power amplifier

#73
20090081968
2009-03-26

Power amplifier controller with polar transmitter

#74
20090061797
2009-03-05

Mobile transmitter and transmitting method thereof

#75
20090039974
2009-02-12

Polar modulation apparatus

#76
20090015324
2009-01-15

Power amplifier amplitude modulator system and method

#77
20080317167
2008-12-25

Generation of a transmission signal

#78
20080304594
2008-12-11

Methods and apparatus for reducing peak-to-RMS amplitude ratio in communication signals

#79
20080299916
2008-12-04

Low noise RF driver

#80
20080284536
2008-11-20

Dual mode power amplifier

#81
20080280573
2008-11-13

Linear RF amplifier with polar feedback

#82
20080268799
2008-10-30

Transmission power controller

#83
20080207144
2008-08-28

Method and system for improving efficiency over power control for linear and class AB power amplifiers

#84
20080157895
2008-07-03

Multi-mode amplitude modulator control method

#85
20080094137
2008-04-24

Power control and modulation of switched-mode power amplifiers with one or more stages

#86
20080068079
2008-03-20

Efficient Narrow Band Amplification Using Phase Amplifier

#87
20080057881
2008-03-06

Bandwidth enhancement for envelope elimination and restoration transmission systems

#88
20080031381
2008-02-07

Transmission circuit and communication device

#89
20080018399
2008-01-24

Multistage amplifier apparatus with distortion compensation function

#90
20080003960
2008-01-03

Polar transmitter amplifier with variable output power

#91
20070298734
2007-12-27

Systems, methods, and apparatuses for linear polar transmitters

#92
20070290749
2007-12-20

Systems, methods, and apparatuses for multi-path orthogonal recursive predistortion

#93
20070290748
2007-12-20

Systems, methods, and apparatuses for linear envelope elimination and restoration transmitters

#94
20070275676
2007-11-29

DAC based switching power amplifier

#95
20070247232
2007-10-25

EER high frequency amplifier

#96
20070211820
2007-09-13

Transmission device and wireless communication apparatus

#97
20070194856
2007-08-23

High frequency power amplifying circuit and high frequency electronic component using the same

#98
20070063765
2007-03-22

Power control and modulation of switched-mode power amplifiers with one or more stages

#99
20070052477
2007-03-08

Efficient power supply for rapidly changing power requirements

#100
20060291589
2006-12-28

Method and apparatus for a fully digital quadrature modulator

#101
20060244523
2006-11-02

Power control and modulation of switched-mode power amplifiers with one or more stages

#102
20060226900
2006-10-12

Demodulation and regulation concept for IR receivers

#103
20060220590
2006-10-05

Operational amplifier, and amplitude modulator and transmitter using the same

#104
20060178119
2006-08-10

Variable bandwidth envelope modulator for use with envelope elimination and restoration transmitter architecture and method

#105
20060018375
2006-01-26

Polar signal processor to drive a segmented power amplifier and method therefore

#106
20050286652
2005-12-29

Transmit signal generator and method

#107
20050195918
2005-09-08

Transmitting circuit, communication equipment, audio equipment, video equipment, and transmitting method

#108
20050127992
2005-06-16

Power control and modulation of switched-mode power amplifiers with one or more stages

#109
20050122164
2005-06-09

Single chip power amplifier and envelope modulator

#110
20050032488
2005-02-10

System and method for current-mode amplitude modulation